One vertex per element, one color per generator, with an edge from x to x·s.
(9,10,13,11)(12,15,16,14)(17,18)(19,21)(20,25)(22,23)(24,26)(27,29)(28,30)(31,32)(1,2)(3,8)(4,5)(6,7)(10,11)(14,15)(18,23)(20,28)(21,24)(27,32) involution — undirected(2,7)(3,4)(9,11,13,10)(12,15,16,14)(18,23)(19,26)(20,28)(29,31)(1,3,6,4)(2,8,7,5)(9,12)(10,14)(11,15)(13,16)(17,19,22,26)(18,24,23,21)(20,27,28,32)(25,31,30,29)(1,4,6,3)(2,5,7,8)(17,20,22,28)(18,25,23,30)(19,27,26,32)(21,29,24,31)(1,5)(2,3)(4,7)(6,8)(17,21,22,24)(18,26,23,19)(20,29,28,31)(25,32,30,27)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.